JPH066523A - Projection reader - Google Patents

Abstract

PURPOSE:To enhance the operation reliability and to improve the workability. CONSTITUTION:A light source 2, a condenser lens 3, a film guide 20, and a screen 10 are arranged on an optical axis L of a cylindrical lens 7. An image forming face S0 corresponding to an effective field angle alpha of the cylindrical lens 7 is formed. A projecting face S1 corresponding to a projection viewer area Lv of the light transmitted through a projection window 21 and an image pickup face S2 corresponding to an image pickup area LS of a light transmitted through a read window 22 are provided on a screen 10. The light in the image pickup area LS is reflected in a reflection mirror 30 before reaching the image pickup face S2 and read by a CCD 11. A viewer projecting face S1 projecting a monitor viewer image and the image pickup face S2 to project the read image are provided independently in the image forming face S0. Thus, the luminous quantity of the image is sufficiently ensured with simple configuration.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a projection / reading device suitable for use in copying machines, printers, facsimiles, image scanners, etc., for projecting an object and reading it while confirming it.

[0002]

2. Description of the Related Art FIG. 5 is a view of a conventional projection / reading device as seen from above.

In this device, a light source 2, a condenser lens 3, a reflection mirror 5, a platen glass 6 are provided in a box-shaped device body 1.
Cylindrical lens (imaging lens) 7, half mirror 9, screen (viewer projection surface) 10, reading sensor (imaging element)
11 and the like are provided.

Light from the light source 2 is condensed by the condenser lens 3 and guided to the reflection mirror 5. Platen glass 6
A film image F, which is a subject, is placed right above the focal plane of the cylindrical lens 7, and the reflected light from the reflection mirror 5 is transmitted through the film image F and the platen glass 6 to the cylindrical lens 7. It is incident as incident light within the effective angle of view α. Then, the light passing through the cylindrical lens 7 is guided to the half mirror 9 arranged on the image forming side of the cylindrical lens 7. The half mirror 9 is formed by vapor-depositing aluminum or the like on the surface of a transparent glass plate, and is about 45 with respect to the optical axis L of the light from the cylindrical lens 7.
It is arranged every time. The light from the cylindrical lens 7 is divided into reflected light and transmitted light by the half mirror 9.

After that, the reflected light forms a monitor viewer image on the screen 10, and an operator visually checks the viewer image to check whether the film image F is a predetermined one or not. It is possible to check the front and back of the image, and also to check whether the focus for image reading is good or bad.

On the other hand, an image of the transmitted light is read by the reading sensor 11. The reading sensor 11 is, for example, C
This is a line sensor in which image pickup devices such as CDs are one-dimensionally arranged in the main scanning direction, and the whole is mounted so as to be movable in the sub scanning direction (direction of arrow K1). This reading sensor 1
The output of No. 1 is converted into an electric signal and input to the plotter to reproduce the image information of the film image F.

FIG. 6 shows still another conventional example.

The main difference from the one shown in FIG. 5 is that a total reflection mirror 12 is mounted instead of the half mirror 9. The total reflection mirror 12 has one end side 12
It is attached so as to be swingable in the arrow R1 direction around a. When the mirror 12 is located at the reflection position (solid line in the figure), the light from the cylindrical lens 7 is reflected by the mirror 12 and projects an image on the screen 10. on the other hand,
When the mirror 12 is located at the retracted position (the one-dot chain line in the figure), all the light from the cylindrical lens 7 is guided to the read sensor 11 side.

In each of the conventional examples, the screen 1
While confirming the film image F through 0, the confirmed image can be read by the reading sensor 11 as needed.

[0010]

However, according to the above-mentioned conventional example, the one using the half mirror 9 is different from the one using the total reflection mirror 12, and the driving member for swinging the half mirror 9 is used. Although it is excellent in that it is not necessary to dispose a control device or the like and the entire structure can be simplified, the half mirror 9 requires an area corresponding to the film image F and the installation position in the optical path, and thus the half mirror is required. 9 It is difficult to form the reflectance and the transmittance uniformly over the entire area, and the total amount of reflected light and transmitted light that can be used is as low as 70 to 80%, which is divided into reflected light and transmitted light. As a result, the efficiency is extremely low and the brightness is low. In addition, the cost is high.

On the other hand, the type in which the total reflection mirror 12 is rotated and moved realizes a reflection efficiency of about 90% and a viewer image with high brightness can be obtained, but the mirror 1
It is necessary to swing 2 to switch between the projection mode and the reading mode. For this purpose, a power source and a drive mechanism for driving the mirror 12 with high accuracy are required, and the overall configuration is inevitably complicated, and it is difficult to secure operation reliability for a long period of time. is there. In addition, the driving of the mirror 12 is frequently repeated every time the viewer image is confirmed and read by the reading sensor 11, which makes it difficult to improve work efficiency.

Therefore, according to the present invention, by providing the viewer projection surface and the imaging surface independently on the image forming surface, it is possible to visually check and read a highly efficient viewer image (subject image) with a simple structure. It is an object of the present invention to provide such a projection / reading device.

[0013]

SUMMARY OF THE INVENTION The present invention has been made in view of the above circumstances, in which a subject (F) is passed through an imaging lens (7) and then the imaging lens (7) is effective. While projecting on the image plane (S ₀ ) corresponding to the angle of view (α),
In a projection / reading device for reading by an image pickup element (11), a viewer projection surface (S ₁ ) for visually observing a projected subject image on the imaging surface (S ₀ ) and the viewer projection surface (S ₁ ). the imaging surface of the independent and (S _2), the provided and the subject image projected on the imaging plane (S ₂₎ image sensor (1
It is characterized by being read in 1).

A projection viewer area (L _V ) corresponding to the viewer projection surface (S ₁ ) is set on the center side within the effective angle of view (α) of the imaging lens, and the imaging surface (S the imaging area corresponding to ₂₎ (L _S), effective field angle in (alpha) and the projection viewer area (L _V of the imaging lens (7)) is set to the outside.

Further, an optical path separation mirror (30) may be arranged in the imaging area (L _S ) and the separated light reflected by the optical path separation mirror (30) may be read by the imaging element (11).

In addition, the subject image projected on the viewer projection plane (S ₁ ) and the image pickup plane (S ₂ ) is moved in the sub-scanning direction, and the subject image (F) read by the image pickup element (11) is read. Information can also be photoelectrically converted.

It is preferable that a light shielding member (31) is arranged between the projection viewer area (L _V ) and the imaging area (L _S ).

[0018]

Based on the above construction, the viewer projection surface (S ₁ ) for projecting the monitor viewer image and the image pickup surface (S ₂ ) for projecting the reading image are respectively formed by the effective image of the imaging lens (7). By independently providing the image on the image forming surface (S ₀ ) corresponding to the angle (α), the viewer image having a sufficient light amount is visually observed by the viewer projection surface (S ₁ ) while the image for reading is also sufficient. Can be obtained. Moreover, these are realized with a simple configuration.

The reference numerals in the parentheses are for the purpose of comparing the drawings, and do not limit the structure of the present invention.

[0020]

Embodiments of the present invention will be described below with reference to the drawings.

FIG. 1 schematically shows a projection / reading apparatus according to the present invention.

This is for projecting a monitor-use viewer image on the viewer projection surface, and reading the image information of the subject corresponding to the viewer image as necessary while checking the viewer image.

The apparatus main body 1 of the projection / reading apparatus has a side plate 1a on the front side and a side plate 1b on the rear side, and is formed in a box shape as a whole. A light source 2 is attached to the front of the front side plate 1a via a fixing member (not shown). A condenser lens 3 is arranged between the light source 2 and the side plate 1a. The condenser lens 3 is formed by a plurality of lenses,
The light emitted from the light source is collected and guided to a film image (hereinafter simply referred to as “film”) F as a subject.

As shown in FIGS. 2 and 3, the film F has a rectangular image portion F ₁ ,
F ₂ ... have, by transmitting these image portions F _1, F ₂ ... the light is designed to project the image on a screen to be described later. Note that FIG. 2 shows the projection and
FIG. 3 is a schematic view of the reader from above, and FIG.
FIG. 3 is a view of the projection / reading device of FIG. 2 viewed from the direction of arrow AA. Therefore, the left side in FIG. 3 is above the projection / reading device, and the right side is below.

A film guide 20 facing the condenser lens 3 is arranged on the side plate 1a behind the condenser lens 3 (on the left side in FIG. 2). In the center of the film guide 20,
A rectangular projection window 21 is formed, and a slit-shaped reading window 22 (see FIG. 3) is formed adjacent to this side. The projection window 21 and the reading window 22 are both formed at positions that are within the effective angle of view α of the cylindrical lens 7 described later. The shape and size of the projection window 21 are substantially the same as those of the image portions F ₁ , F _2, ... Of the film F, and more specifically, slightly larger than these. Projection window 2
When the vertical length of 1 is 21a and the horizontal width is 21b, these are set to be slightly larger than the vertical and horizontal directions of the image portions F ₁ , F _2, ... That is, all the light transmitted through the image portions F ₁ , F _2, ... Is formed in such a size that it can pass through the projection window 21. On the other hand, the length 22a of the reading window 22 is also formed to be longer than the vertical dimension of the image portions F ₁ , F _2, ... Like the projection window 21. Therefore, the film F is indicated by the arrow K
When moving in two directions (sub-scanning direction), the image portion F ₁ ,
The entire F ₂ ... Passes over the reading window 22.

The apparatus main body 1 behind the film guide 20
A cylindrical lens 7 as an image forming lens is arranged substantially at the center. The cylindrical lens 7 has an effective angle of view (image forming area where aberration is corrected) α, and regarding the arrangement position,
The projection window 21 and the reading window 2 of the film guide 20 described above.
2 is set in such a position as to fit within this effective angle of view α.

An image plane S ₀ corresponding to the effective angle of view α is formed on the side plate 1b further rearward of the cylindrical lens 7. A screen 10 is disposed inside the image plane S ₀ , and an inner surface 10 a of the screen 10 has a viewer projection area corresponding to an area where the light passing through the projection window 21 passes, that is, a projection viewer area L _V. The surface S ₁ is formed. Further, on the inside of the image plane S _{0 and on} the outside of the viewer projection plane S ₁ ,
An area through which the light passing through the reading window 22 described above passes, that is, an imaging surface S ₂ corresponding to the imaging area L _S is formed. That is, inside the image plane S ₀ , the viewer projection plane S ₁
And the imaging surface S ₂ are formed independently. Regarding the shape and size of the screen 10, for example, as long as it is capable of projecting _one entire image portion F ₁ , that is, larger than the projection viewer area L _V , the shape and size can be arbitrary.

The light source 2, condenser lens 3, film guide 20 (projection window 21) and screen 10 described above are
All of them are arranged exactly on the optical axis L of the cylindrical lens 7.

On the other hand, each member for processing the light in the image pickup area L _S passing through the reading window 22 is arranged at a position deviated from the optical axis L between the cylindrical lens 7 and the rear side plate 1b. It is set up.

First, within the effective angle of view α of the cylindrical lens 7,
Kamo Projection Viewer Area L_V On the outside of the
A reflection mirror 30 is arranged. The reflection mirror 30 is
Imaging area L passing through the reading window 22 and the cylindrical lens 7_S Within
Of the imaging area S₂ Should reach
It is formed long in the same direction as the reading window 22 to reflect light.
ing. The entire reflection mirror 30 has a projection viewer area L.
_V And imaging area L_S By the light shielding member 31 arranged between
Covered. The light blocking member 31 has an imaging area L. _S The light of
It has a vertically long slit-shaped opening 31a in the passing portion.
It

A CCD line sensor (hereinafter simply referred to as "CCD") 11 as a reading member is arranged in front of the reflection mirror 30. The CCD 11 is formed by arranging a large number of image pickup elements in a line in a vertical direction (longitudinal direction of each of the reading window 22 of the film guide 20 and the reflection mirror 30). When the light in the image pickup region L _S , that is, the image portions F ₁ , F ₂ ... Of the film F pass over the reading window 22 in the direction of the arrow K2, the CCD 11 receives the image portion F.
_The light that passes through ₁ , F _2, ..., Passes through the reading window 22, and reaches the CCD 11 via the condenser lens 7 and the reflection mirror 30 is one-dimensionally read. Therefore, as the film F moves in the sub-scanning direction in the direction of arrow K2, the CCD 11 two-dimensionally reads each of the image portions F ₁ , F _2, ...

On the reflection mirror 30 side of the CCD 11, a shading plate 32 having a slit 32a is provided. The shading plate 32 is the same as the shading member 3 described above.
1, the light in the imaging area L _S is transmitted to the projection viewer area L _V.
It is possible to prevent the light from being disturbed or the light quantity being insufficiently disturbed by the reflected light or the like.

The transport mechanism for the film F includes, for example, a transparent holder that holds the film F from both front and back sides, a rail member that guides the holder so that the holder can move in the left-right direction, and a pulse motor that drives the holder to the left and right. It can be easily configured by a combination of.

Next, the operation of the above embodiment will be described.

First, the light source 2 is turned on, and the image portion F ₁ of the film F is projected onto the projection window 21 of the film guide 20.
Set to. The irradiation light from the light source is collected by the condenser lens 3 and illuminates the image portion F ₁ . This light passes through the image portion F ₁ , passes through the projection window 21, and reaches the cylindrical lens 7 as the light of the projection viewer area L _V. This light reaches the screen 10 through the cylindrical lens 7,
The image corresponding to the image portion F ₁ is projected on the viewer projection surface S ₁ of the screen 10. This projected viewer image,
The operator visually confirms from the outside of the screen 10.
For example, it is to check whether this image is the one you are looking for, if so, whether the front and back of the image are correct, whether it is in focus, etc.

After these checks, the image portion F ₁
If you need to read, do the following:

The film F is moved in the sub-scanning direction indicated by the arrow K2 by the above-mentioned transport mechanism. Then, when the tip of the above-mentioned image portion F ₁ reaches the reading window 22, reading is started. That is, the light from the condenser lens 3 is
The light in the imaging region L _S is transmitted through the tip portion of the image portion F ₁ , passes through the reading window 22, and is guided to the reflection mirror 30 via the cylindrical lens 7 where it is reflected and CC
Reach D11. Then, further move the film F through the arrow K.
If it is moved in two directions, the image portion F ₁ will be read sequentially from the reading window 2
The image information of the entire image portion F ₁ is 2 by the light of the imaging region L _S that passes above the image portion ₂ and linearly transmits the image portion F _1.
It is dimensionally scanned and read by the CCD 11.

The image information read in this way can be subjected to photoelectric conversion, then converted into a digital signal and held, or can be subjected to additional image processing.

When the image portions F ₁ , F ₂ ... Are continuous on the film F, the above operation is performed for each image portion F ₁ , F _2.
It is possible to read all the image information on the film F by repeating the process for.

As described above, the projection and the reading of the image are
By performing almost simultaneously with the subject images projected on the viewer projection surface S ₁ and the imaging surface S ₂ which are independently formed in the image forming surface S ₀ , respectively, sufficient necessary light amounts can be secured. Since both operations can be performed in parallel, there is almost no loss in terms of time, and high-quality images can be read efficiently.

FIG. 4 shows another embodiment.

This is the screen 10 and the CCD 11 arranged behind the cylindrical lens 7 in the above-mentioned embodiment.
This is a modification of the configuration such as.

Behind the cylindrical lens 7, another reflecting mirror 12 is provided.
To arrange. The reflection mirror 12 reflects the light in the projection viewer area L _V that has passed through the cylindrical lens 7, but does not reflect the light in the imaging area L _S. Therefore,
Projection viewer area L _V reflected by the reflection mirror 12
The screen 10 for projecting the light inside is arranged on the upper surface 1c of the apparatus main body 1, while the imaging area L _S from the cylindrical lens 7 is arranged.
The CCD 11 for reading the light inside is mounted on the side plate 1b behind the apparatus main body 1.
It is provided on the side. Also in this embodiment, the light in the projection viewer area L _V behind the cylindrical lens 7 and the imaging area L _S
It is effective to provide a light blocking member (not shown) that clearly separates the light from the light inside.

As can be seen from the above-mentioned two embodiments, the main point of the present invention is that the projection viewer area L _V for monitoring and the imaging area L _S for reading are divided and each is independent. Therefore, behind the cylindrical lens 7,
The presence / absence of a reflection mirror for reflecting these lights, the arrangement positions of the screen 10 and the CCD 11 and the like may be appropriately determined. Therefore, in principle, the reflection mirror 30 shown in FIG. 2 is not necessary at all, and the CCD 11 may be arranged on the image pickup surface S ₂ .

[0045]

As described above, according to the present invention,
By forming the projection surface for projecting the viewer image for monitoring and the imaging surface for projecting the reading image independently within the imaging surface corresponding to the effective angle of view of the imaging lens, special movement is possible. Since it is possible to secure a sufficient amount of light for each without using any member, it is possible to improve the operation reliability over a long period of time, improve the projection and reading accuracy, and further improve the work efficiency.

[Brief description of drawings]

FIG. 1 is an explanatory perspective view showing an outline of a projection / reading device according to the present invention.

FIG. 2 is a schematic view of the inside of the projection / reading device as seen from above.

FIG. 3 is a view taken along the line AA of FIG.

FIG. 4 is a perspective explanatory view showing the outline of another embodiment.

FIG. 5 is an explanatory plan view showing a conventional projection / reading device.

FIG. 6 is an explanatory plan view showing another conventional projection / reading device.

[Explanation of symbols]

7 Imaging Lens (Cylindrical Lens) 11 Imaging Device (CCD) 30 Optical Path Separation Mirror (Reflecting Mirror) 31 Light-shielding Member F Subject (original film image) L _S Imaging Area L _V Projection Viewer Area S ₀ Imaging Surface S ₁ Viewer Projection Surface S ₂ Image plane α Effective angle of view

Claims (5)

[Claims] 1. A projection / reading device for projecting an object through an imaging lens onto an imaging surface corresponding to an effective angle of view of the imaging lens and reading the same with an imaging element, wherein: A viewer projection surface for visually observing the projected subject image and an imaging surface independent of the viewer projection surface are provided, and the subject image projected on the imaging surface is read by the imaging element. Projection / reading device. 2. A projection viewer area corresponding to the viewer projection surface is set on the center side within the effective angle of view of the imaging lens, and an imaging area corresponding to the imaging surface is set as an effective area of the imaging lens. The projection / reading apparatus according to claim 1, wherein the projection / reading apparatus is set within an angle of view and outside the projection viewer area. 3. The projection / reading device according to claim 2, wherein an optical path separation mirror is arranged in the imaging area, and the separated light reflected by the optical path separation mirror is read by the imaging element. 4. The object image projected on the viewer projection surface and the image pickup surface is moved in a sub-scanning direction, and the information of the object image read by the image pickup element is photoelectrically converted. The projection / reading device according to claim 3. 5. The projection / reading device according to claim 2, wherein a light blocking member is provided between the projection viewer area and the imaging area.